Go ahead and get personal copies if you want to, just know that the prices are going to head low and stay low for some time, which is what happened to the MH2 fetchlands
Im not 100% sold on Soul Diviner, since there arent too many good counters to plunder outside of planeswalkers and loyalty seems way too valuable to cash in for cards
Since Inti casts from exile we also can run some powerful exile support synergies: Party Thrasher ramps out noncreature spells, Iraxxa, Empress of Mars generates creatures, Unstable Amulet burns out opponents, but my favorite is Impending Flux which is a one-sided wipe that doubles as a way to finish off opponents
Incredible has
Commanders matter because not only do they dictate your decks colours and therefore the cards you can include in your deck, but much like the super-powerful companion mechanic, they are a card you always have access to
Endless Punishment, a Black/Red deck